Question

explain the statement by giving two example it is not necessary that the pathogen may affect an organ or tissue depending upon the form the point of entry

Answer 1

: 'It is not necessary that the pathogen may affect an organ or tissue depending upon the point of entry.' (a) AIDS causing virus-enter through sex organs - spread to lymph modes all over the body.

Answer 2

Answer:

The pathogen entry does not necessarily affect an organ or tissue upon its entry, which is explained below.

Explanation:

A pathogen is a disease-causing organism that enters the body through different routes such as mouth, nose, skin, blood, or sexual contact. Different types of microbes seem to have evolved to home in different parts of the body. The entry of pathogen depends on two factors:  

1. type of pathogen

2. point of contact or the easiest accessible route

Once after entering the body, the immune system fights against it and shows the immune responses. This results in the appearance of symptoms of the disease on different sites (the targeted tissue or organ) in the body.

For example:    

1. The pathogen for typhoid or cholera enters through food and water and hence the point of entry is the mouth. Symptoms include fever, headache and in case of typhoid, it is loose motion. Thus it affects the whole body.
2. HIV responsible for AIDS enters through sexual interaction but reaches lymph nodes all over the body and weakens the system.

So the pathogen doesn't need to affect an organ or tissue depending on the form of entry.